21133802 has 8 divisors (see below), whose sum is σ = 31728576. Its totient is φ = 10557612.

The previous prime is 21133787. The next prime is 21133813. The reversal of 21133802 is 20833112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×21133802⁴ (a number of 30 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328 + ... + 6635.

It is an arithmetic number, because the mean of its divisors is an integer number (3966072).

Almost surely, 2^21133802 is an apocalyptic number.

21133802 is a deficient number, since it is larger than the sum of its proper divisors (10594774).

21133802 is a wasteful number, since it uses less digits than its factorization.

21133802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9292.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 21133802 is about 4597.1515093588. The cubic root of 21133802 is about 276.4771292588.

Adding to 21133802 its reverse (20833112), we get a palindrome (41966914).

The spelling of 21133802 in words is "twenty-one million, one hundred thirty-three thousand, eight hundred two".